is a Japanese light novel series written by Nekoda and illustrated by Asahiko. It initially began serialization on the Moonlight Novels female adult section of Shōsetsuka ni Narō in December 2017. It was later acquired by Ichijinsha who began publishing the series under its Ichijinsha Melissa light novel imprint in November 2020. A manga adaptation illustrated by Seikan began serialization on Ichijinsha's Zero Sum Online manga website in July 2021.
Synopsis Cecilia, the daughter of a marquis, has suddenly realized that she is a person who was reincarnated into an otome game as the villainess of that game. However, at the point of the story, she has already faced condemnation as she had her engagement canceled and was forced into prostitution. Her first client is the heroine's childhood friend Lucas Herbst, much to Cecilia's terror. However, Lucas offers to make her his fiancée.
Media Light novel Written by Nekoda, The Villainess and the Demon Knight initially began serialization on the Moonlight Novels female adult section of the user-generated novel publishing website Shōsetsuka ni Narō on December 6, 2017. It was later acquired by Ichijinsha who began publishing it with illustrations by Asahiko under its Ichijinsha Melissa light novel imprint on November 2, 2020. Five volumes have been released as of February 12, 2025. The light novels are licensed in English by Seven Seas Entertainment.
Manga A manga adaptation illustrated by Seikan began serialization on Ichijinsha's Zero Sum Online manga website on July 16, 2021. The manga's chapters have been collected into five volumes as of February 2026.
During their panel at Anime Expo 2022, Seven Seas Entertainment announced that they licensed the manga for English publication.
Reception By December 2023, the series had over 1.5 million copies in circulation.
The manga adaptation, alongside The Transfer Destination Was a World with few Pharmacists, won the Isekai Comic Prize at NTT Solmare's Digital Comic Awards in 2024.
References
External links at Shōsetsuka ni Narō